It was not possible, because of the antiquity of the Ea cult and the peculiar position that he, as a common heirloom of all Babylonia, occupied; nor was it desirable, for to do so would be to cut off completely the bond uniting Babylon to its own past and to the rest of Babylonia.

The solution of the problem was found in making Ea, the father of Marduk--the loving and proud father who willingly transfers all his powers and qualities to his son, who rejoices in the triumph of his offspring, and who suffers no pangs of jealousy when beholding the superior honors shown to Marduk, both by the gods and by men.
Ea and Marduk.
The combination of the two gods is particularly frequent in the so-called incantation texts.

Marduk becomes the mediator between Ea and mankind.

The man smitten with disease, or otherwise in trouble, appeals to Marduk for help, who promptly brings the petition to his father Ea.
The latter, after modestly declaring that there is nothing that he knows which his son Marduk does not know, gives Marduk the necessary instructions, which in turn are conveyed to the one crying for divine succor.

It is clear that these texts have been reshaped with the intention of adding to the glory of Marduk.